Question

use chart for 21-26

Question 21 5 pts Greene & Touchstone conducted a study to relate birth weight to the estriol levels from 24-hour urine specimens taken from pregnant women who are near term. The test can provide indirect evidence of an abnormally small fetus. The scatter plot of the data is shown below. We want to perform a statistical test to find linear relationship between birth weight and estriol levels. Linear regression result shows that y = 21.52 + 0.608x best fits the data with R2 = 0.34457 (please use this information to answer questions 21 through 26). A 40- o birth weight o B C O o

Answer 1

Q 21 Option D is correct The line of best fit Y= 21.52+0.608X indicates that there is positive correlation and it indicates that line D indicates this equation.

Q 22 Residual is defines as Y- 21.52+0.68X

Q23 positive coefficient of X ( 0.608) indiacate that there is positive linear relationship between birth weight and estriol levels

Q 24 the value of R² = 0.34457 indicates that variance of birth weight can be somewhat explained by estriol levels

Q25 to test the slope of regression line is zero we use t test

Q 26 option D  as p value = 0.0003 is less than alpha = 0.001 therefore slope of regression line should be different from zero